Be my buddy and get the OVA of Nogizaka Haruka no Himittsu. I know you had to take down the first two seasons...but... sneak this in for a week lol

The big problem with CR getting an OVA (especially the short ones that are 1-3 episodes) is the contract expense. Unless they can somehow "bundle it in" with another longer title, there is virtually no way for them to recoup the cost of negotiating the contract, much less the minimum guarantee.